80 CJ 7 water pump help pls - JeepForum.com
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post #1 of 16 Old 08-15-2019, 07:22 PM Thread Starter
Jedicazador
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80 CJ 7 water pump help pls

Hey y'all thanks for looking hopefully someone has run into this and can offer some advise.
I have a 1980 cj7 has a 258, did a water pump replacement today, the original double pulley doesn't have the clearance on the new pump to rotate freely. The replacement pump is a Murray cp3403 and the old pump I'm assuming was original, I've had the jeep for nearly 30 years and it only has 41k miles on her.
Is there a place I can find pulleys that will work with the new pump? The local parts stores are coming up short on where to get the pulley.
Thanks in advance for your time and help

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post #2 of 16 Old 08-15-2019, 08:08 PM
cjoffroad
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Running V-belts? I would check and make sure you didn't get a water pump for a serpentine belt. Your double pulley should fit.
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post #3 of 16 Old 08-15-2019, 08:33 PM
John Strenk
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There were 3 different water pumps for use with v-belts. All had different mounting heights for the flange for mounting the fan

Did you turn your old one in?
Usually you need to check the height of the mounting flange for the fan to be sure they are the same.

If the pulley rubs, you can add some spacers behind the pulley to move it out. That is what I did on mine.

A different pulley might not line up with the other pulleys. Then you will be flipping belts off.

Here is a good example of different twin v-belt pulleys
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post #4 of 16 Old 08-15-2019, 08:37 PM Thread Starter
Jedicazador
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Thanks for the help
Yes V belt, and I checked and double checked.
oreilys only has two water pumps for the 258, master pro and Murray, they are within .02 of each other, there is no option for serpentine belt. So I don't think that's the issue. I'm guessing there is a new pulley for the new style pump but i dunno thanks again
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post #5 of 16 Old 08-15-2019, 08:43 PM Thread Starter
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Thanks John,good look out for the pulley belt jump issue. Can't use spacers cause I wouldn't have enough of the shaft to mount the fan to the wp face.
yes I still have my old water pump, have a bearing going out may have to just fix that and keep rolling if all else fails
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post #6 of 16 Old 08-15-2019, 08:44 PM
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If your pump has the same bolt pattern as the pulley, it is only a question of shimming?

The serpentine belt pump looks similair on the outside but the pump impeller is flipped or set up to run from the other direction. I think some of them have an R marked on to show "reverse" rotation.

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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #7 of 16 Old 08-15-2019, 09:01 PM
John Strenk
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Maybe you can use a bearing puller to pull the flange out a little on the pump shaft.

If the new shaft is long enough


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post #8 of 16 Old 08-15-2019, 09:03 PM
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Quote:
Originally Posted by John Strenk View Post
There were 3 different water pumps for use with v-belts. All had different mounting heights for the flange for mounting the fan

Did you turn your old one in?
Usually you need to check the height of the mounting flange for the fan to be sure they are the same.

If the pulley rubs, you can add some spacers behind the pulley to move it out. That is what I did on mine.

A different pulley might not line up with the other pulleys. Then you will be flipping belts off.

Here is a good example of different twin v-belt pulleys
Quote:
Originally Posted by Jedicazador View Post
Thanks John,good look out for the pulley belt jump issue. Can't use spacers cause I wouldn't have enough of the shaft to mount the fan to the wp face.
yes I still have my old water pump, have a bearing going out may have to just fix that and keep rolling if all else fails
Is there not a factory spacer in between the water pump and the pulley?. Mine has one but not sure if it is factory. Looks like this but not as big of a spacer
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fansp9_1.4972.jpg  
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post #9 of 16 Old 08-15-2019, 09:19 PM
BagusJeep
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These are the parts on the book for this year, there are indeed spacers in some instances but only on the idlers, so many different configurations exist in reality. the parts book is pointing towards part 48 having been fitted originally, no spacer.
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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #10 of 16 Old 08-15-2019, 09:29 PM
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And this is the water pump itself, looks identical with or without serpentine / reverse rotation but no spacer listed.
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BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #11 of 16 Old 08-15-2019, 09:31 PM
BagusJeep
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Having taken so many apart, I would not trust the parts book on whether you need a spacer, especially with an aftermarket part made by the chicomm.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
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post #12 of 16 Old 08-16-2019, 09:50 AM Thread Starter
Jedicazador
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Thanks for all the suggestions and help, I've ordered another pump, the Murray one I purchased is iron, the other brand I just ordered is aluminum maybe that will shed some light and I can use the same pulley, I'll know tomorrow
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post #13 of 16 Old 08-16-2019, 12:46 PM
mc190
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I'm doing the water pump on my 1980 CJ7 258 this weekend. Getting my pump from Autozone (as they are right down the street). I'll post if I have any clearance issues as you outlined.
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post #14 of 16 Old 08-19-2019, 06:26 AM
mc190
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no issues with fit on the one I got from Advanced auto Parts (not Autozone). CARQUEST New Premium Water PumpPart # T4097.
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post #15 of 16 Old 08-21-2019, 05:49 PM Thread Starter
Jedicazador
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Just wanted to say thank you for the help, I have resolved the issue. The murray pump I originally got was for a 1980 258 but there was clearance issues, I ordered a different year1979 Murray water pump had a longer pulley shaft and fit with no problems. Had a to solder the radiator mounts and replaced all belts and hoses, all is good!
Thanks again for your time and help
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